Power-hammer.



No. 837,519. PATENTED DEC. 4, 1906. G. H. TOLLEY & W. G. SIMOOGK.

POWER HAMMER.

APPLICATION FILED mus, 1906.

2 SHEETS-SHEET 1.

0Q grwenfow 3 Witnesses No. 837,519. PATENTED DEC. 4, 1906. G. H. TOLLEY & W. G. SIMCOOK.

POWER HAMMER.

APPLICATION FILED MAY 3. 1906.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

GEORGE H. TOLLEY AND WILLIAM (ir. SIMCOCK, OF DENVER, COLORADO.

POWER-HAMMER.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed May 3. 1906. Serial No. 314,977.

To (all, whom it may concern:

Be it known that we, GEORGE II. ToLLEY of Denver and State of Colorado, have in- E vented certain new and useful Improvements in Power-lfanimers; and we do hereby declare the following to be a'full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

For beam or helve opera-ted power-hammers we have made certain improvements designed to effect more advantageous control over the hammer under all conditions of work and in which the structure. is organized to cause the blow of the hammer to be rendered light or heavy, to render the same weight of blow constant, to maintain a uniform length of stroke under all conditions, to

hold the hammer-head when not working at any adjustment, to cause the hammer to fall lower or to rise higher under different work, to so lower the fulcrum of the beam to cause the lowering of the hammer for working with alight blow or to raise the fulcrum to cause a heavy blow, and thereby adapt ,the hammer to a. thin or to a thick piece to be treated. and to effect all these adjustments automatically by the treadle and connections therewitli and at the will of the operator in changing the position of his foot on the treadle.

'Fllt structure shown in the accompanying l l l drawings illustrates our invention in the form which at present is preferred by us; but we 1 wish it to be understood that we do not desire to be limited to the exact details of con- 3 st ruction shown and described, for oliYiiius iiiodilications will occur to a person skilled in the art and without departing from the spirit of our invention and without exceeding the scope of the claims.

Referring to the drawings, Figure l represents our improved ptl\\'(l'-llktllllli(l' in side elevation, the actuating-treadh and its connections being in their normal positions with the hammer-driving friction-gear out of engagement. Fig. 2 is a vertical longitudinal section of the same with the operating-gear iii the position shown in Fig. l. Fig. 3 is an enlarged view of the treadle and its operat the positions shown in Fig. 1. Fig. 4 shows, enlarged, in vertical section the adiustingscrew and cross-head wliiclicoiinect thehammer-actuating beams at the rear of the ing connections with the operating-gear in l frame. Fig. 5 is :1 horizontal section on the line 5 5 of Fig. 1, showing enlarged the hammer-actuating beams and their connections with the hammer-head, the adjusting-screw,

and the crank-eonneeted rod. Fig. 6 is a vertical section of the hammer-head, en-

larged, showing its cushionirig-springs.

lteferring to Figs. 1 and 3, it will be noted that the treadle and its connections are iiitheir normal positions.

The frame 1 is of a construction adapted for the work of a power-hammer and in which the hammer-head is mounted at the front and operated by a pair of beams or helves 2 7o 2, fulcrunied at the rear, and the powerdriven crank-shaf t I; is mounted in the lower part of the frame.

The anvil 4 and its sup iorts 5 may be of the usual construction and front of the frame in any suitable way, while the hammer-head (i is mounted for vertical movement in guides T at the front of the frame in a way well known in power-hammers. sary to particularly describe these parts. The hammer-head is o'ierated by a beam or helve movement, and for this purpose a pair of beams 2 2, one on each side of the lead, are connected to the ends of a pin 6, 85

.\lediately of the beams they are connected 0 by pivots 1'. to a guide-block 12, through a central guide-opening 13 in which the crankacluated connecting-rod 14 passes and actuates the beams vertically to transmit the crank movement to the hammer-head. pivot-pinh' for the front ends of the beams is supported between a pair of plates 15. illILt in the opening in the hammer-head and cushioned each by a pair of springs 16, seated in the opening to cushion the blows of the 100 hammer. 'lhese springs, while serving to cushion the haminer-blows, also prevent. the

jar affecting the fulcrum of the beams and also the beams themselves The working of the pivot of the beams in the opening in the. 105' hammer-head allows it to have free vertical movements in the frame-guides and compensates for the are described by the beams from their fulcrum. At the mediate guideblock the connection of the beams with the IIO crank-actuated connectingrod is made by a nin'of coiled )l'llWS l7 Its one above and the connected to the it is not, therefore, deemed neces- The other below the said guide-block, the under spring resting on a shoulder it), fixed on the rod 14, the upper spring held on the rod by nuts .20, and both springs pressing against the guide-blockgof the beams so that the tension of the springscan be regulated by the nuts. The rear ends of the beams are fulerumed on pivot-bearings 2t 21 of the eross head it), which is vertically adjustable in guides 11, fixed upon the rear of the frame. A screw-threaded shaft 22 passes vertically through a threaded central opening in this cross-head and is suspended in bearings 23 in the frame and carries at its lower end a friction-gear24, so that the rotation of the screw-shaft in either direction will cause the cross-head 10 to rise or fall, and with it the connected ends of the. beams, for a purpose presently stated.

The beam-actuating crank-shaft is mountedhorizontally in bearings .5 in the base portion of the frame, and has splined thereon a duplex fricticm-gear adapted to be engaged alternately with the friction-gear 2-4 on the lower end of the screw-shaft, whereby to cause it to be rotated to the right or to the left, there being for this purpose a loose powerdriven pulley .26 on the rearend of the crankshaft, controlled by a. clutch operated by the treadle. The clutch is s )lllHtl upon the shaft and is formed of a double cone, one part 27 adapted to engage a (()I](. })Ot\(llI1I recessin the loose pulley,the otliercone partilsadapted to engage a corresponding recess in the frame, while a bell-crank lever 29 is caused to engage in the usual wayby a pin 30a groove in the elutehandis at its lowerarmconnected by a spring 31 to the. base of the frame. which springconstantlytendstopullthelowerarmof tcluteh-connected end to be forced inward. thereby causing the clutch part 28 to be pressed into the framerecess. giving the clutch the function of a brake during which.

the clutch part 27 is released from the loose pullej and the crank-shaft disconnected from the power.

VVhil'e it is the function of the treadle to control the rotation of the crank-shaft. it is the function of the friction-gear to control the vertical adjustments of the fulcrum of the beams by means'wliich we will now de scribe. The treadle is pivotally mounted at the base of the frame and at its inner end is pivoted to the horizontal spring-connected arm of the clutch-lever 29. and at its other end the treadle has a foot-rest 32, pivoted thereon so as to project equally at both sides of the pivot to allow a rocking movement. At its inner end this foot-rest has pivotedthereto a link 33, t0 the upper end of which is pivoted a horizontal bell-crank lever 34, Which at its vertical branch is pivoted to the frame and engages byits upper end the groove of a duplex friction-gear splined on thecrank- 1e bell-crank down, and thereby cause its shaft, whereby the frictioi'i-gear is caused to have a slidable movement to cause either gear to be engaged with the friction-gear of the screw-shaft to cause its rotation to the right or to the left to adjust the fulcrum of the beamsup or down. For this purpose the friction-gear 24 ofthe screw-shaft has a conical form, and the duplex friction-gears each have a corresponding conical form, and the screw-shaft is mounted so that the conical face of its gear will work between the conical faces 0') and 36 of the duplex friction-gear. the distance between the latter being a little greater than the diameter of the conical face of the shaft-gear to allow a slight movement ofthe duplex gear on its shaft for the engagement of either gear with said shaft gear to cause it to be rotated to the right or to the left. As the cross-head It) of the beams is caused by the rotation of the screw-shaft to be adjusted up or down. as said shaft maybe rotated to the right or to the left. the hammer will be caused to fall lower or be raised higher, and if the cross-head be lowered. and with it) the fulcrumed ends of the beams. the object placedon the anvil will not be hit so hard; but if the cross-head be raised, and with it the fulcrumed elltls'of the beams. the hammer will fall lower and be caused to strike a heavier blow, and in this way the hammer can be adjusted to cause a blow ranging from no blow at all to the full blow of the hammer. As the rotation of'the screwshaft is very rapid when in engagement with the friction-gear, a slight pressure upon the foot-rest will cause the hammer to be raised a quickfullstrokeorless.oraquickfullstrokeor lessdo'wn.it being understood that theoperatormaintainshisfootuponthefoot-restsolong as the hammer is operating. 'hatever adjustment the operator may give, the stroke of the hammer will always be the same. because the adjustment of thcheight of the fulcrumed end of the beams will cause the angle of the beams to be greater or less in rel tion to a horizontal plane and cause the hammer to work closer or farther away from the anvil when the Mam-actuating crank is turning its lowest point.

ln operating the hammer the operator puts his foot with uniform pressure upon the foot-rest and presses it down and holds it down with the treadle-lcver to which it is pivoted. which causes the rear end of said treadle lever to be raised. raising ticreby its connected arm of the clutchlever and causing the outer member 27 of he clutch to be moved outward and engaged with tie loose pulley. causing the rotation of t e cranlesl'al't and by its connecting-rod 1-! and beams ti'e operation of the hammer. Should it be deemed best to increase the force of the hammer-blow. tl'e operator throws tire pressure on his lcel. which causes the footrest to be tilted in tl e direction of the arrow 37, raising thereby its end, and with it the link 33 and its connected bellcrank lever, 'which causes the duplexgear to be moved rearward and engaging its member with the shaft-gear 24, causing the rotation of said shaft to the right, and thereby causing the fulcrumed ends of the beams to be raised, and necessarily lowering the hammer to increase the force of the blow. If, however, it be deemed best to decrease the force of the blow, the operator, still keeping the clutch by his foot in engagement with the power-driven pulley, brings the toe part of his foot into pressing action upon the foot rest, causing it to be rocked forward on its pivot, as indicated by the arrow 38, pulling down its connected bell-crank lever and causing the rear member 36 of the duplex frict-i n-gear to be moved frontward into engagement with the gear of the sci'ewshaft, causing thereby its rotation to the left, and necessarily the hammer will not be caused to fall so low and giving a lighter blow. l/Vhen the operator has found the desired adjustment, of the fulcrum of the. beams, he holds his foot with uniform pressure upon the footrest until he desires to change again the force of the blow. In this way the rocking of the foot-rest frontward or rearward by pressure of the toe or of the heel of the operators foot will give the desired adjustment to the hammer-actuating beam to change and determine'the force of the blow. We prefer friction-gear for operating the crankshaft, because it insures quick and certain engagement for rotating the screw-shaft.

It is important to note that the crank-connected rod is cushioned on its upward throw by compressing the lower spring against the guide-block of the beams, while the rod is cushioned on its downward throw by compressing the upper spring against said block. It is also important to note that while tl'fi foot-rest is pivotally mounted on the tiieadle its connections for causing the rotation of the screw-shaft in either direction are independent of the treadle in its function of controlling the operation of the hammer; but the mounting of the foot-rest upon the treadle gives the important advantage of controlling the foot-rest and the treadle by the same foot-pressure and at the same time. As the crank-connected rod is caused to have a slight lateral swing with the movement of the beams, the rod is pivot-ally jointed at 39, near the crank-bearing 40, to allow of such swing.

We claim 1. In a power-hammer, a frame, an anvil, a vertically-slidable hammer-head and a crank-shaft, a pair of beams pivotally connected to the hammer-head and having a cross-head at their rear ends, vertical guides for said cross-head, said cross-head having a screw-threaded opening and bearings on which the'beams are fulcrumed, a screwshaft vertically mounted in engagement with said cross-head opening, a guide-block mediat ely of said beams having a central opening, a erailk-connected rod passing through said opening, means for cushioning the connection of said rod with the beams, means under the control of the operator whereby the screw-shaft may be rotated in either direction, and means for operating the crankshaft.

2. In a power-hammer, a frame, an anvil, a vertically-slidable hammer head, and a crank-shaft, a pair of beams pivotally con nected to the hammer-head and having a cross-head, vertical guides for said crosshead, said cross-head having a screw-threaded opening and bearings on which the beams are fulcrumed, a screw-shaft vertically mounted in engagement with said cross-head opening, a duplex gear on the crank-shaft adapted to engage and operate said screw-shaft, a crank-connected rod for operating said beams, a treadle and means connecting it with said crank-shaft, a footrest pivoted on said treadle, and means connectin it with said duplex gear whereby the screw-shaft may be rotated in either direction to raise andlower the fulcrumed ends of said beams for the purpose stated.

3. In a power-hammer, a frame, an anvil, a vertically-slidable hammer-head and a crank-shaft mounted in the frame, a pair of beams pivotally connected to the hammerhead and having a vertically-slidable cross- [00 head at their rear ends on which the beams are fulcrumed, a screw-shaft verticall mounted in the frame inengagement with said cross-head, a crank-connected rod for operating said beams, and means under the to 5 control of the operator whereby,, tihe screw shaft is caused to be rotated in either direction, consisting of africtionear on the depending end of said screw-shaft, a duplex frictionear splined on the crank-shaft each I 10 of said uplex ear adapted for engagement with the gear of the screw-shaft, a lever having pivotal connection with said duplex gear, and a pivotall -mounted foot-rest pivotally connected wit said lever, whereby the tilt r15 ing or oscillation of the foot-rest is caused to shift the duplex friction-gear to cause it to be put in engagement with the ear of the screw-shaft to cause it's rotation in either direction.

4. In a power-hammer, a frame, an anvil, a vertically-slidable hammer-head, and a crank-shaft having a slidable duplex gear a pair of beams pivotally connected to the hammer-head and having a criiss-head, verti- I 2 5 cal guides for said cross-head, said cross-head having a screw-threaded opening and bearings on which the beams are fulcrumed, a screw-shaft verticall mounted in engagement with said crosscad opening, a crank- 0 connected rod for operating said beams, a

pivoted foot-rest means connecting it with said duplex gear, whereby the screw-shaft may be rotated in either direction to raise and lower the fulcrum ends of said beams, a clutch on the crank-shaft. a treadle on which said foot-rest is pivoted, and means connecting said treadle with the clutch whereby the said duplex gear and the clutch are actuated by said pivoted footerest for the purpose stated.

5. In a power-hammer, a frame, an anvil, a vertically-slidable hammer-head, a vertical screw-shaft mounted in the rear of the frame and having a gear on its lower end, a pair of beams pivotally mounted on the hammerhead and onsaid screw-shaft and the latter engaging the pivotal mounting of said beams, a crank-connected rod mediately connected to said beams, a crank-shaft mounted in the base of the frame, a slidable duplex gear on the crank-shaft adapted to engage the gear on the vertical screw-shaft, a power-driven pulley and a clutch on the crank-shaft, a treadle engaging said clutch, a foot-rest pivoted on said treadle, means connecting .said foot-rest with the duplex gear whereby the duplex gear is engaged to cause the screwshaft to be rotated in either direction to raise and to lower the beamsat their screw-shaftconnected ends and the clutch operated in connection with the engagement of the duplex gear with said screw-shaft for the purpose stated.

6. Ina power-hammer and in combination, a vertical slidable hammer-head,, a vertical screw-shaft having a gear on its lower end, a pair of beams pivotally mounted on the hammer-head and on said screw-shaft the latter engaging the pivotal mounting of said beams, a crank-shaft, a crank connected rod mediately engaging and actuating said beams, a slidable duplex gear on said crank-shaft, a slidable clutch and a powerdriven pulley all on said crank-shaft, a treadle connected with I said clutch, a foot-rest pivotally mounted on said treadle and means connecting said footrest with the duplex gear, whereby the combined treadle and foot-rest are conjointly op- 1 erated to cause the screw-shaft to be rotated f in opposite directions for the purpose stated. I 7. In apower hammer and in combination, a vertically-slidable hammer-head, a vertical 1 gagement with the gear of said screw-shaft,

to cause its rotation in opposite directions, and means for controlling the operation of said crank-shaft.

8. In a power-hammer, a slidable hammer head, a screw-shaft having a gear on its lower end, a pair of beams pivotally mounted on the hammer-head, a cross-head engaging the screw-shaft and pivotally enga ing the rear ends of the-beams, a guide-block f iaving pivotbearings mediately connecting the beams, a crankshaft, slidable gear thereon adapted to engage the gear on the screw-shaft, a rod passingthrough said guide-block connecting the crank and having a pivot connection at right angles to the crank, means for operating the crank-shaft, and means whereby the gear thereon is caused to engage the gear of the screw-shaft to cause its rotation to the right or to the left.

9. In a power-hammer, a slidable hammerhead, a pair of beams, pivotally connected to the hammer-head, a crank-shaft, a crank-connected rod mediately connecting said beams, a screw-shaft on which the rear ends of said beams are fulcrumed, a gear on the lower end of said shaft, a duplex gear on the crank-shaft adapted to engage the gear on said screwshaft, a pivotally-mounted foot-rest, lever connections for said duplex gear and the footrest, means for adjustably connecting said screw-shaft with the fulcrum of the beams, and means for operating the crank-shaft, whereby the foot-rest is adapted to control the gearto rotate the screw-shaft in opposite directions, for the purpose stated.

In testimony whereof we have signed our namesto this specificati on in the presence of two subscribing witnesses.

GEORGE H. TOLLEY. WILLIAM G. SIMCOCK. Witnesses:

FRED. I. BURRIS, H. P. ELLI's. 

